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The Nanohardness of Acicular Ferrite and Bainitic Ferrite in Low Carbon Microalloying Steel (2007)

Shang, Cheng Jia ; Liang, X. ; Wang, Xue Min ; [et al.]

s.l. ; Stafa-Zurich, Switzerland

Materials science forum Vol. 561-565 (Oct. 2007), p. 65-68

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ISSN: 1662-9752

Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008

Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Notes: Dynamic continuous stiffness measurement (CSM) nanoindentation method was applied tomeasure nanohardness in low carbon microalloying steel. The matrix hardness for quenched phaseand acicular ferrite calculated through analysis of curves is less fluctuated than the raw results, whichshows that the analysis of the curves is helpful for determining matrix hardness

Type of Medium: Electronic Resource

URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.561-565.65.pdf

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Polaron properties in ternary group-III nitride mixed crystals (2005)

Yan, Z. W. ; Ban, S. L. ; Liang, X. X.

Springer

The European physical journal 43 (2005), S. 339-345

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ISSN: 1434-6036

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract. Polaron properties are studied in bulk wurtzite nitride ternary mixed crystals AxB1-xN (A, B = Al, Ga, In) with the use of a dielectric continuum Fröhlich-like electron-phonon interaction Hamiltonian. The polaronic self-trapping energy and effective mass are analytically derived by taking the mixing properties of the LO and TO polarizations due to the anisotropy effect into account in the mono-phonon approximation. The numerical computation has been performed for the wurtzite ternary mixed crystal materials InxGa1-xN, AlxGa1-xN, and AlxIn1-xN as functions of the composition x. The results show that the polaronic self-trapping energies in the wurtzite structures are bigger than that in zinc-blende structures for the materials calculated. It is also found that the structure anisotropy increases the electron-phonon interaction in wurtizte nitride semiconductors. The results indicate that the LO-like phonon influence on the polaronic self-trapping energy and effective mass is dominant, and the anisotropy effect is obvious.